Body Armor Levels: NIJ Ratings, Soft vs. Hard, and Buyer Rules

Body armor levels in the United States are set by the National Institute of Justice, and each level is defined by the exact caliber and velocity the armor must stop before it earns that rating. Under NIJ Standard 0101.06, the familiar Roman-numeral tiers run from Level IIA soft armor for common handgun rounds up to Level IV hard plates rated for armor-piercing rifle ammunition. A newer standard, 0101.07, is replacing those numerals with letter-based names (HG1, HG2, RF1, RF2, RF3), and both systems will be in circulation for the next several years.¹

The point of the standard is that the label means the same thing across manufacturers. A Level IIIA vest from one company was tested against the same threats as a Level IIIA vest from another, because both went through the same protocol at an independent laboratory. That’s why the rating on the label is worth anything at all, and why unrated armor sold online is a different category of product entirely.

Soft Armor: The Handgun Levels

Soft armor uses flexible ballistic fabrics and is worn concealed or under a uniform. It stops handgun rounds only. NIJ 0101.06 defines three tiers.

Level IIA

Level IIA is the thinnest and lightest. It must stop 9mm full metal jacket rounds at 1,225 feet per second and .40 S&W rounds at 1,155 feet per second.² The trade-off is a narrower threat window in exchange for concealment and all-day comfort. The upcoming 0101.07 standard eliminates this tier, so it will disappear from the market over time.

Level II

Level II steps up to faster 9mm rounds at 1,305 feet per second and adds .357 Magnum jacketed soft point ammunition at 1,430 feet per second.² It’s a long-standing choice for patrol officers who wear a vest every day. The added protection over IIA comes with only a modest increase in thickness.

Level IIIA

Level IIIA is the highest soft-armor tier. It must defeat .357 SIG rounds at 1,470 feet per second and .44 Magnum semi-jacketed hollow points at 1,430 feet per second.² Those are among the most powerful common handgun loads, so a IIIA vest covers essentially any pistol or revolver threat you’re likely to face. The panels are noticeably thicker than Level II but most IIIA vests remain concealable under a loose shirt or jacket.

No soft armor at any level will stop a rifle round. If rifle threats are the concern, you need hard plates.

Hard Armor: The Rifle Levels

Rifle rounds carry far more kinetic energy than handgun ammunition, and stopping them requires rigid plates made from steel, ceramic composites, or ultra-high-molecular-weight polyethylene. Plates are inserted into a carrier worn over the torso.

Level III

Level III plates must stop 7.62mm NATO full metal jacket rounds (military designation M80) at 2,780 feet per second, and the test requires the plate to survive six fair hits without a single penetration.² This is a standard non-armor-piercing rifle round.

There’s an important gap here. The Level III test uses a 7.62mm round, not a high-velocity 5.56mm round. Some 5.56mm loads, particularly the M855 “green tip,” can defeat certain Level III plates because of their velocity and construction. That gap is what “special threat” and “Level III+” labels try to address informally, and what the new RF2 rating addresses formally.

Level IV

Level IV is the highest tier the NIJ certifies. Plates must stop a .30-06 Springfield armor-piercing round (M2 AP) at 2,880 feet per second.² The test only requires survival against a single hit rather than six, which reflects both the extreme energy involved and the fact that a ceramic strike face typically cracks on initial impact. The ceramic shatters the hardened steel core of the projectile, and a composite backing catches whatever remains. Level IV is the go-to choice for anyone facing potential rifle threats with armor-piercing capability.

The New Names Under NIJ 0101.07

The NIJ finalized Standard 0101.07 and began testing armor against it in spring 2024. The Compliance Testing Program stopped accepting new armor models under 0101.06 in early 2024, though existing 0101.06-certified products will remain on the active list through at least the end of 2027.¹ During the overlap you’ll see armor sold under both naming systems.

The Roman numerals are replaced with letter-based designations that separate handgun and rifle threats:

HG1 replaces the old Level II. Covers standard handgun threats like 9mm and .357 Magnum.
HG2 replaces the old Level IIIA. Covers higher-energy handgun rounds including .44 Magnum.
RF1 replaces the old Level III. Covers intermediate rifle rounds like 7.62x51mm M80 Ball.
RF2 is a new intermediate tier with no direct predecessor. Covers everything at RF1 plus additional threats like 5.56mm M855, filling the gap that “Level III+” tried to address informally.
RF3 replaces the old Level IV. Covers armor-piercing rifle threats including .30-06 M2 AP.

“HG” stands for handgun, “RF” for rifle. Level IIA has no equivalent under the new standard, effectively retiring that tier. The specific test ammunition and velocities are no longer inside the body armor standard itself; they’ve been moved to a separate document, NIJ Standard 0123.00.¹ The creation of RF2 is arguably the most meaningful practical change, because it officially closes the 5.56mm vulnerability that made standard Level III plates unreliable against one of the most common rifle rounds in the country.

What “Level III+” and “Special Threat” Actually Mean

You’ll frequently see labels like “Level III+” or “Special Threat Rated” when shopping for plates. These are not official NIJ designations. They’re manufacturer claims that a plate has been tested against specific threats beyond the standard NIJ protocol. A “Level III+” plate might be verified against M855 green-tip 5.56mm rounds that defeat standard Level III, but the “+” has no standardized definition and no NIJ certification behind it.

The new RF2 rating is partly the NIJ’s response to this problem, giving manufacturers an official certification path for plates that stop both 7.62mm M80 and 5.56mm M855. Until RF2-certified products are widely available, special-threat claims require trusting the manufacturer’s own testing. Look for manufacturers who publish their test data or use NIJ-accredited labs for the verification, even when the specific rating sits outside the NIJ system.

One more label worth understanding: “In Conjunction With,” or ICW. An ICW plate only achieves its stated protection level when paired with a specific soft armor backer. An ICW plate rated for rifle threats will not stop those threats on its own. If you see this label, confirm exactly which soft armor panel it was tested with. Substituting a different backer leaves you with an untested combination.

Ballistic Ratings Don’t Cover Knives

NIJ ballistic levels tell you nothing about stab or spike resistance. That’s a separate standard entirely, NIJ 0115.00, which defines three protection levels based on strike energy and tests separately for edged blades and improvised spikes.³ A vest that stops bullets will not necessarily stop a knife. Some manufacturers make multi-threat armor that meets both standards, but each rating has to be earned through its own testing. If edged-weapon threats matter for your situation, verify the armor carries an explicit 0115.00 rating rather than assuming your ballistic vest covers it.

Confirming a Rating Is Real

The easiest way to check whether a specific armor model is actually NIJ-certified is the Compliant Products List maintained by the NIJ Compliance Testing Program. It’s searchable by manufacturer and posted on the NIJ’s website.⁴ Certified products also carry a physical NIJ mark on the label.

A few things the list will not include: the NIJ has never certified ballistic backpacks, blankets, briefcases, or anything other than torso-worn body armor.⁴ If a product claims an “NIJ-rated” protection level but isn’t a vest or plate insert, that claim has no official backing. The same skepticism applies to any armor advertising a level while missing from the Compliant Products List.

Who Can Legally Buy Body Armor

Body armor is legal to purchase and own throughout the United States for most people. The federal restriction is narrow. Under 18 U.S.C. § 931, it’s illegal to purchase, own, or possess body armor if you’ve been convicted of a felony that qualifies as a crime of violence.⁵ Not all felonies qualify, only violent ones as defined in federal law. The statutory maximum sentence for a violation is three years in prison.⁶

There is one affirmative defense. If your employer provides written certification that body armor is necessary for your job, you may possess and use it during the course of that employment even with a qualifying conviction.⁵ Separately, wearing body armor while committing a federal crime of violence or drug trafficking offense triggers enhanced sentencing under 18 U.S.C. § 924(c).

State laws sit on top of the federal rule. Some states add restrictions on civilian purchases, and the rules vary. A few states limit online sales, require in-person transactions, or restrict possession to specific professions. Check your state’s statutes before buying if you have any doubt about local eligibility.

1
National Institute of Justice. Ballistic Resistance of Body Armor, NIJ Standard 0101.07
2
National Institute of Justice. Ballistic Resistance of Body Armor NIJ Standard-0101.06
3
National Institute of Justice. Stab Resistance of Personal Body Armor NIJ Standard-0115.00
4
National Institute of Justice. Compliant Products List – Ballistic Resistant Body Armor
5
Office of the Law Revision Counsel. 18 USC 931 – Prohibition on Purchase, Ownership, or Possession of Body Armor by Violent Felons
6
United States Sentencing Commission. Amendment 670